I have to say that ScreenCasting has become one of my favorite tools for helping students get instruction outside the normal channels. It is a great method for students who need repetition of verbal and visual cues rather than a sheet outlining a list of requirements.
For those who need it, here is a list of some screemcasting software:
Feel free to use any in the process of creating tutorials or lessons for your students. For more possibilities, go to this article.